function getWindowHeight() 
{
	var windowHeight = 0;
	if (typeof(window.innerHeight) == 'number') 
	{
		windowHeight = window.innerHeight;
	}
	else 
	{
		if (document.documentElement && document.documentElement.clientHeight) 
		{
			windowHeight = document.documentElement.clientHeight;
		}
		else 
		{
			if (document.body && document.body.clientHeight) 
			{
				windowHeight = document.body.clientHeight;
			}
		}
	}

	return windowHeight;

}

function setFooter() 
{
	if (document.getElementById) 
	{
		var windowHeight = getWindowHeight();
		if (windowHeight > 0) 
		{
			var contentHeight = document.getElementById('container').offsetHeight;
			var mainContent = document.getElementById('section').offsetHeight;
			var footerElement = document.getElementById('footer');
			var footerHeight  = footerElement.offsetHeight;
			if (windowHeight - (contentHeight + footerHeight) >= 0) 
			{
				footerElement.style.position = 'absolute';
				footerElement.style.top = (windowHeight - (contentHeight + footerHeight)) + 'px';
			}
			else 
			{
				footerElement.style.position = 'absolute';
				var section = (mainContent + footerHeight + 160);
				var ad = (contentHeight + footerHeight + 140);
				if (section > ad)
				{
					footerElement.style.top = section + 'px';
				}
				else
				{
					footerElement.style.top = ad + 'px';
				}
			}	
		}
	}
}

window.onload = function() 
{
	setFooter();
}